Re: [Gems-users] Ruby for x86 machine

[Dan Gibson <degibson@xxxxxxxx>]

To get an idea of the problems relating to Ruby's interactions with Simics memory objects, read the following posts:
https://lists.cs.wisc.edu/archive/gems-users/2006/msg00063.shtml
https://lists.cs.wisc.edu/archive/gems-users/2007-September/msg00065.shtml

You should also read the Simics Reference Manual on the topic 'memory spaces'.

The x86 patch for Ruby modifies ruby.c to account for differences in memory spaces between SPARC and x86 targets. If this operation has failed, it could cause your problem. This is why I asked you to verify if Ruby is attached to all memory spaces. See the above posts, and the reference manual, and find out if Ruby is set as the timing module for all memory spaces.

Regards,
Dan

On Tue, Dec 29, 2009 at 3:42 AM, Muhammad abid Mughal <mabidm_pieas@xxxxxxxxx> wrote:

actually sparc uses memory-mapped i/o so you can i/o req whereas x86 does not

it uses special i/o inst (IN and OUT) and separate address space

you have to find i/o address-space obj then attach Ruby as i told u already

I have not done it before

---

From: Sitos Lin <sitos.lin@xxxxxxxxx>
To: Gems Users <gems-users@xxxxxxxxxxx>

Sent: Tuesday, December 29, 2009 17:14:05

Subject: Re: [Gems-users] Ruby for x86 machine

Hello:
  I am trying case 2 and 3, and I have modified the files
simics/SimicsDriver and simics/SimicsProcessor to capture the requests
filtered in function isUnhandledTransaction(). Here, my question is
this modification can capture all requests (including the ones
filtered out in isUnhandledTransactions: ifetch/prefetch/dma/io ...)
for case 2, but not works for case 3. That means,
isUnhandledTransaction does not receive the requests such as DMA/IO.
So, I can not capture the requests from device in x86 machine. So, I
have no idea what's wrong. :)
Best regards,
  Sitos

2009/12/29 Muhammad abid Mughal <mabidm_pieas@xxxxxxxxx>:
> Hi,
> There are three cases
>  1. Opal + Ruby
>  2. Simics(Sparc)+ Ruby and
>  3. Simics (x86) + Ruby.
> You have performed the first one but to perform 2nd or 3rd you have to
>  follow:
>    If you are using Simics and Ruby then for every memory
> operation(ie  ld/st/atomic/ifetch/prefetch/dma/io, etc)  simics calls this
> function
>      SimicsDriver::makeRequest() and this function filters out
> all  unsupported operations(ie i/o , DMA,cache flush, prefetch)
>  via  SimicsDriver::isUnhandledTransaction(). so this way DMA/ io
> operations  are not passed to Ruby and not cached in any caches.
>
>  you need to make some changes to this
> function  SimicsDriver::isUnhandledTransaction(). whenever memory is
> accessed by DMA
>  or I/O device this  IS_DEV_MEM_OP(mem_trans->s.ini_type) returns true and
> you can use  'mem_trans' arg to do some profiling
>  Hope it helps
>  Regards,
>  Muhammad abid
>
> ________________________________
> From: Sitos Lin <sitos.lin@xxxxxxxxx>
> To: Gems Users <gems-users@xxxxxxxxxxx>
> Sent: Tuesday, December 29, 2009 16:02:38
> Subject: Re: [Gems-users] Ruby for x86 machine
>
> Hi:
>   I found that for both sparc and x86 machine, ruby is attached to
> phys_mem0 (x86) or phys_mem (sparc). If the phys_mem0 (or phys_mem)
> represnets the physical memory. Why I can get the memory requests from
> device in Sparc/Ruby, but only get the memory requests from processor
> in x86/Ruby? Does some objects filter the requests from device in x86
> machine, so that them can not reach phys_mem0? Thank you.
> Best regards,
>   Sitos
>
> 2009/12/29 Muhammad abid Mughal <mabidm_pieas@xxxxxxxxx>:
>> Hi,
>>     You dont need to attach Ruby to physical memory, its already
>> attached.In
>> Simics , Every physical memory object (of class ram) has associated
>> memory-space(class of simics) object.. To see if ruby attached ,Type
>> following commands on simics CLI
>> Ultrsparc processor specific, Give them a try
>>  list-objects    display all objects in the system . try to find obj like
>> "phys_mem0" then type
>> phys_memo.map   Display which ram object(s) this memory space is attached
>> @conf.phys_mem0.timing_model  If ruby attached then display ruby
>> @conf.cpu0.physical_memory  Display name of memory-space to which this
>> processor attached
>>
>> To see how Ruby attached to timing_model of memory-space
>> see init_local in ruby.c file
>>
>> Regards,
>> Muhammad abid
>> ________________________________
>> From: Sitos Lin <sitos.lin@xxxxxxxxx>
>> To: Gems Users <gems-users@xxxxxxxxxxx>
>> Sent: Tuesday, December 29, 2009 12:37:08
>> Subject: Re: [Gems-users] Ruby for x86 machine
>>
>> Hello:
>>   I attach Ruby to the x86 machine by following the same instructions
>> from the quick start:
>>
>> instruction-fetch-mode instruction-fetch-trace
>> istc-disable
>> dstc-disable
>> cpu-switch-time 1
>> load-module ruby
>> ruby0.setparam g_NUM_PROCESSORS 1
>> ruby0.setparam g_MEMORY_SIZE_BYTES 4294967296
>> ruby0.init
>>
>>   There is no instruction indicating which physical memory objects
>> ruby attach to. How can I attach ruby to a specific memory object?
>> Thank you.
>>
>> Best regards,
>>   Sitos
>>
>> 2009/12/28 Dan Gibson <degibson@xxxxxxxx>:
>>> Sitos,
>>> Make sure you have attached Ruby to all physical memory objects. The
>>> serengeti target in Simics has only one, but as I recall, the x86 target
>>> has
>>> many physical memory spaces.
>>>
>>> Regards,
>>> Dan
>>>
>>> On Mon, Dec 28, 2009 at 4:03 AM, Sitos Lin <sitos.lin@xxxxxxxxx> wrote:
>>>>
>>>> Hello:
>>>>  I have modified several files in Ruby to capture the memory access
>>>> from device (DMA operations). It works well with Sparc machine. I can
>>>> see the memory requests both from processor and device. However, when
>>>> I load Ruby module to a x86 machine, there are only requests from
>>>> processor without the requests from device. Do x86 machine need
>>>> additional modifications? Thanks.
>>>> Best regards,
>>>>  Sitos
>>>> _______________________________________________
>>>> Gems-users mailing list
>>>> Gems-users@xxxxxxxxxxx
>>>> https://lists.cs.wisc.edu/mailman/listinfo/gems-users
>>>> Use Google to search the GEMS Users mailing list by adding
>>>> "site:https://lists.cs.wisc.edu/archive/gems-users/" to your search.
>>>>
>>>
>>>
>>>
>>> --
>>> http://www.cs.wisc.edu/~gibson [esc]:wq!
>>>
>>> _______________________________________________
>>> Gems-users mailing list
>>> Gems-users@xxxxxxxxxxx
>>> https://lists.cs.wisc.edu/mailman/listinfo/gems-users
>>> Use Google to search the GEMS Users mailing list by adding
>>> "site:https://lists.cs.wisc.edu/archive/gems-users/" to your search.
>>>
>>>
>>>
>> _______________________________________________
>> Gems-users mailing list
>> Gems-users@xxxxxxxxxxx
>> https://lists.cs.wisc.edu/mailman/listinfo/gems-users
>> Use Google to search the GEMS Users mailing list by adding
>> "site:https://lists.cs.wisc.edu/archive/gems-users/" to your search.
>>
>>
>> ________________________________
>> Get your preferred Email name!
>> Now you can @ymail.com and @rocketmail.com.
>> _______________________________________________
>> Gems-users mailing list
>> Gems-users@xxxxxxxxxxx
>> https://lists.cs.wisc.edu/mailman/listinfo/gems-users
>> Use Google to search the GEMS Users mailing list by adding
>> "site:https://lists.cs.wisc.edu/archive/gems-users/" to your search.
>>
>>
>>
> _______________________________________________
> Gems-users mailing list
> Gems-users@xxxxxxxxxxx
> https://lists.cs.wisc.edu/mailman/listinfo/gems-users
> Use Google to search the GEMS Users mailing list by adding
> "site:https://lists.cs.wisc.edu/archive/gems-users/" to your search.
>
>
> ________________________________
> Get your new Email address!
> Grab the Email name you've always wanted before someone else does!
> _______________________________________________
> Gems-users mailing list
> Gems-users@xxxxxxxxxxx
> https://lists.cs.wisc.edu/mailman/listinfo/gems-users
> Use Google to search the GEMS Users mailing list by adding
> "site:https://lists.cs.wisc.edu/archive/gems-users/" to your search.
>
>
>
_______________________________________________
Gems-users mailing list
Gems-users@xxxxxxxxxxx
https://lists.cs.wisc.edu/mailman/listinfo/gems-users
Use Google to search the GEMS Users mailing list by adding "site:https://lists.cs.wisc.edu/archive/gems-users/" to your search.

---

Get your preferred Email name!
Now you can @ymail.com and @rocketmail.com.

_______________________________________________
Gems-users mailing list
Gems-users@xxxxxxxxxxx
https://lists.cs.wisc.edu/mailman/listinfo/gems-users
Use Google to search the GEMS Users mailing list by adding "site:https://lists.cs.wisc.edu/archive/gems-users/" to your search.

-- 
http://www.cs.wisc.edu/~gibson [esc]:wq!